Results for "G-C Guo"

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Quantum memory for individual polarization photonJan 05 2003Sep 16 2003Here we present an experimentally feasible quantum memory for individual polarization photon with long-lived atomic ensembles excitations. Based a process similar to teleportation, the memory is reversible. And the storage information can be effortlessly ... More
Phase separation in a polarized Fermi gas with spin-orbit couplingJun 28 2011Sep 30 2011We study the phase separation of a spin polarized Fermi gas with spin-orbit coupling near a wide Feshbach resonance. As a result of the competition between spin-orbit coupling and population imbalance, the phase diagram for a uniform gas develops a rich ... More
{\it Ab initio} studies of spin-spiral waves and exchange interactions in 3{\it d} transition metal atomic chainsFeb 18 2011The total energy of the transverse spin-spiral wave as a function of the wave vector for all 3$d$ transition metal atomic chains has been calculated within {\it ab initio} density functional theory with generalized gradient approximation. It is predicted ... More
Magnetic moment and magnetic anisotropy of linear and zigzag 4{\it d} and 5{\it d} transition metal nanowires: First-principles calculationsMar 11 2010An extensive {\it ab initio} study of the physical properties of both linear and zigzag atomic chains of all 4$d$ and 5$d$ transition metals (TM) within the GGA by using the accurate PAW method, has been carried out. All the TM linear chains are found ... More
An {\it ab initio} study of the magnetic and electronic properties of Fe, Co, and Ni nanowires on Cu(001) surfaceFeb 18 2011Magnetism at the nanoscale has been a very active research area in the past decades, because of its novel fundamental physics and exciting potential applications. We have recently performed an {\it ab intio} study of the structural, electronic and magnetic ... More
Systematically improvable optimized atomic basis sets for {\it ab inito} calculationsMay 24 2010We propose a unique scheme to construct fully optimized atomic basis sets for density-functional calculations. The shapes of the radial functions are optimized by minimizing the {\it spillage} of the wave functions between the atomic orbital calculations ... More
Systematic {\it ab initio} study of the magnetic and electronic properties of all 3d transition metal linear and zigzag nanowiresAug 07 2007It is found that all the zigzag chains except the nonmagnetic (NM) Ni and antiferromagnetic (AF) Fe chains which form a twisted two-legger ladder, look like a corner-sharing triangle ribbon, and have a lower total energy than the corresponding linear ... More
Electronic structure interpolation via atomic orbitalsDec 22 2010We present an efficient scheme for accurate electronic structure interpolations based on the systematically improvable optimized atomic orbitals. The atomic orbitals are generated by minimizing the spillage value between the atomic basis calculations ... More
Second-harmonic generation and linear electro-optical coefficients of BN nanotubesMay 06 2005Jul 01 2005A systematic {\it ab initio} study of the second-order nonlinear optical properties of BN nanotubes within density functional theory in the local density approximation has been performed. Highly accurate full-potential projector augmented-wave method ... More
Tuning of the hole spin relaxation time in single self-assembled In$_{1-x}$Ga$_x$As/GaAs quantum dots by electric fieldJul 22 2014We investigate the electric field tuning of the phonon-assisted hole spin relaxation in single self-assembled In$_{1-x}$Ga$_{x}$As/GaAs quantum dots, using an atomistic empirical pseudopotential method. We find that the electric field along the growth ... More
Excitonic effects in the optical properties of SiC sheet and nanotubesMay 27 2011The quasiparticle band structure and optical properties of single-walled zigzag and armchair SiC nanotubes (SiC-NTs) as well as single SiC sheet are investigated by ab initio many-body calculations using the GW and the GW plus Bethe-Salpeter equation ... More
Magnetic anisotropy and spin-spiral wave in V, Cr and Mn atomic chains on Cu(001) surface: First principles calculationsApr 06 2011Recent ab intio studies of the magnetic properties of all 3d transition metal(TM) freestanding atomic chains predicted that these nanowires could have a giant magnetic anisotropy energy (MAE) and might support a spin-spiral structure, thereby suggesting ... More
Towards scalable entangled photon sources with self-assembled InAs/GaAs quantum dotsDec 09 2014Biexciton cascade process in self-assembled quantum dots (QDs) provides an ideal system for deterministic entangled photon pair source, which is essential in quantum information science. The entangled photon pairs have recently be realized in experiments ... More
Reply to the comment on `` Manipulating the frequency-entangled states by an acoustic-optical modulator''Nov 11 2000In the paper [1], authors claim that the scheme for entanglement swapping using an acoustic-optical modulator [2] is flaw. In this reply, we show there is a trivial mistake in the scheme [2], but the main conclusion is still correct, that is, the acoustic-optical ... More
Observation of an in-plane magnetic-field-driven phase transition in a quantum Hall system with SU(4) symmetrySep 10 2007Sep 11 2007In condensed matter physics, the study of electronic states with SU(N) symmetry has attracted considerable and growing attention in recent years, as systems with such a symmetry can often have a spontaneous symmetry-breaking effect giving rise to a novel ... More
Scheme for demonstrating Bell theorem in tripartite entanglement between atomic ensemblesSep 01 2002We propose an experimentally feasible scheme to demonstrate quantum nonlocality, using Greenberger-Horne-Zeilinger (GHZ) and $W$ entanglement between atomic ensembles generated by a new developed method based on laser manipulation and{} single-photon ... More
Faithful remote state preparation using finite classical bits and a non-maximally entangled stateJul 04 2003Feb 25 2004We present many ensembles of states that can be remotely prepared by using minimum classical bits from Alice to Bob and their previously shared entangled state and prove that we have found all the ensembles in two-dimensional case. Furthermore we show ... More
Bounds for state-dependent quantum cloningSep 16 2002Due to the no-cloning theorem, the unknown quantum state can only be cloned approximately or exactly with some probability. There are two types of cloners: universal and state-dependent cloner. The optimal universal cloner has been found and could be ... More
Projection Measurement of the Maximally Entangled N-Photon State for a Demonstration of N-Photon de Broglie WavelengthNov 18 2005Dec 11 2005We construct a projection measurement process for the maximally entangled N-photon state (the NOON-state) with only linear optical elements and photodetectors. This measurement process will give null result for any N-photon state that is orthogonal to ... More
Atomistic theory of spin relaxation in self-assembled In$_{1-x}$Ga$_x$As/GaAs quantum dots at zero magnetic fieldNov 22 2010We present full atomistic calculations of the spin-flip time (T$_{1}$) of electrons and holes mediated by acoustic phonons in self-assembled In$_{1-x}$Ga$_x$As/GaAs quantum dots at zero magnetic field. At low magnetic field, the first-order process is ... More
Probing Quantum Hall Pseudospin Ferromagnet by Resistively Detected NMRApr 06 2009Resistively Detected Nuclear Magnetic Resonance (RD-NMR) has been used to investigate a two-subband electron system in a regime where quantum Hall pseudo-spin ferromagnetic (QHPF) states are prominently developed. It reveals that the easy-axis QHPF state ... More
Experimental Studies of Scaling Behavior of a Quantum Hall System with a Tunable Landau Level MixingJul 02 2008Temperature dependence of the longitudinal and Hall resistance is studied in the regime of localization-delocalization transition. We carry out measurements of a scaling exponent $\kappa$ in the Landau level mixing region at several filling factors. The ... More
The water system and radon measurement system of Jiangmen Underground Neutrino ObservatoryJun 28 2018The Jiangmen Underground Neutrino Observatory (JUNO), a 20ktons multi-purpose underground liquid scintillator detector, was proposed with the determination of the neutrino mass hierarchy as a primary physics goal. Due to low background requirement of ... More
Molecule States in a Gate Tunable Graphene Double Quantum DotNov 24 2010We have measured a graphene double quantum dot device with multiple electrostatic gates that are used to enhance control to investigate it. At low temperatures the transport measurements reveal honeycomb charge stability diagrams which can be tuned from ... More
Non-equilibrium phase-transitions in multi-component Rydberg gasesJun 28 2016Highly-excited Rydberg atoms have strong long-range interactions resulting in exotic optical prop erties such as large single photon non-linearities and intrinsic bistability. In this paper we study optical-driven non-equilibrium phase transitions in ... More
Proposal for optical parity state re-encoderOct 30 2007We propose a re-encoder to generate a refreshed parity encoded state from an existing parity encoded state. This is the simplest case of the scheme by Gilchrist et al. (Phys. Rev. A 75, 052328). We show that it is possible to demonstrate with existing ... More
Heralded quantum memory for single-photon polarization qubitsJul 10 2008Aug 29 2013We propose a scheme to implement a heralded quantum memory for single-photon polarization qubits with a single atom trapped in an optical cavity. In this scheme, an injected photon only exchanges quantum state with the atom, so that the heralded storage ... More
A large-scale one-way quantum computer in an array of coupled cavitiesApr 28 2009Aug 29 2013We propose an efficient method to realize a large-scale one-way quantum computer in a two-dimensional (2D) array of coupled cavities, based on coherent displacements of an arbitrary state of cavity fields in a closed phase space. Due to the nontrivial ... More
Electrically driven magnetic antenna based on multiferroic compositesDec 19 2016We suggest and demonstrate via large scale numerical simulations an electrically operated spin- wave inducer based on composite multiferroic junctions. Specifcally, we consider an interfacially coupled ferromagnetic/ferroelectric structure that emits ... More
First-principles study of multiferroic RbFe(MoO$_4$)$_2$Mar 06 2014We have investigated the magnetic structure and ferroelectricity in RbFe(MoO$_4$)$_2$ via first-principles calculations. Phenomenological analyses have shown that ferroelectricity may arise due to both the triangular chirality of the magnetic structure, ... More
Non-collinear Andreev reflections in semiconductor nanowiresMar 23 2014Aug 28 2014We show that noncollinear Andreev reflections can be induced at interfaces of semiconductor nanowires with spin-orbit coupling, Zeeman splitting and proximity-induced superconductivity. In a noncollinear local Andreev reflection, the spin polarizations ... More
Partial transposition on bi-partite systemSep 12 2006Many of the properties of the partial transposition are not clear so far. Here the number of the negative eigenvalues of K(T)(the partial transposition of K) is considered carefully when K is a two-partite state. There are strong evidences to show that ... More
Permutation asymmetry inducing entanglement between degrees of freedom in multiphoton statesFeb 05 2008Jul 31 2008We describe and examine entanglement between different degrees of freedom in multiphoton states based on the permutation properties. From the state description, the entanglement comes from the permutation asymmetry. According to the different permutation ... More
Ab initio calculation of intrinsic spin Hall conductivity of Pd and AuJan 21 2009An {\it ab initio} relativistic band structure calculation of spin Hall conductivity (SHC) ($\sigma_{xy}^z$) in Pd and Au metals has been performed. It is found that at low temperatures, intrinsic SHCs for Pd and Au are, respectively, $\sim 1400 (\hbar/e)(\Omega ... More
Remote polarization entanglement generation by local dephasing and frequency upconversionMay 04 2017We introduce a scheme for remote entanglement generation for the photon polarization. The technique is based on transferring the initial frequency correlations to specific polarization-frequency correlations by local dephasing and their subsequent removal ... More
When hadrons become unstable: a novel type of non-analyticity in chiral extrapolationsMay 17 2011Hadron masses show a specific dependence on the quark masses. Therefore, the variation of these masses can cause a resonance in a hadronic scattering amplitude to become a bound state. Consequently, the amplitude exhibits a non-analytic behavior at this ... More
Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba_0.7K_0.3Fe_2As_2: NMR in a single crystalMar 29 2009Aug 18 2009We report the first ^{75}As-NMR study on a single crystal of the hole-doped iron-pnictide superconductor Ba_{0.7}K_{0.3}Fe_2As_{2} (T_c = 31.5 K). We find that the Fe antiferromagnetic spin fluctuations are anisotropic and are weaker compared to underdoped ... More
Computation of topological charges of optical vortices via non-degenerate four-wave-mixingMar 10 2006In this paper, we report an experiment, which demonstrates computation of topological charges of two optical vortices via non-degenerate four-wave-mixing process. We show that the output signal beam carries orbital angular momentum which equals to the ... More
Probing trihedral corner entanglement for Dirac fermionsOct 05 2018We investigate the universal information contained in the Renyi entanglement entropies for a free massless Dirac fermion in three spatial dimensions. Using numerical calculations on the lattice, we examine the case where the entangling boundary contains ... More
π-Plasmon Dispersion in Free-Standing Graphene by Momentum-Resolved Electron Energy-Loss SpectroscopyDec 30 2014The {\pi}-plasmon dispersion in graphene was scrutinized by momentum(q)-resolved electron energy-loss spectroscopy with an improved q resolution and found to display the square root of q dispersion characteristic of the collective excitation of two-dimensional ... More
Heavy Quarkonium π^+π^- Transitions and a Possible b\bar{b}q\bar{q} StateOct 14 2004Apr 21 2006$\pi^+\pi^-$ transitions of heavy quarkonia, especially the $ \Upsilon(3S)\to\Upsilon(1S)\pi^+\pi^-$ decay process, are revisited. In the framework of the Chiral Unitary Theory (ChUT), the $S$ wave $\pi\pi$ final state interaction (FSI) is included. It ... More
Entanglement changing power of two-qubit unitary operationsMar 23 2004We consider a two-qubit unitary operation along with arbitrary local unitary operations acts on a two-qubit pure state, whose entanglement is C_0. We give the conditions that the final state can be maximally entangled and be non-entangled. When the final ... More
Nonclassical photon pairs generated from a room-temperature atomic ensembleSep 24 2003Nov 18 2003We report experimental generation of non-classically correlated photon pairs from collective emission in a room-temperature atomic vapor cell. The nonclassical feature of the emission is demonstrated by observing a violation of the Cauchy-Schwarz inequality. ... More
Topological Analysis of Emerging Bipole Clusters Producing Violent Solar EventsDec 11 2013During the rising phase of Solar Cycle 24 tremendous activity occurred on the Sun with fast and compact emergence of magnetic flux leading to bursts of flares (C to M and even X-class). We investigate the violent events occurring in the cluster of two ... More
Observation of Four-Photon de Broglie Wavelength by State Projection MeasurementDec 23 2005A measurement process is constructed to project an arbitrary two-mode $N$-photon state to a maximally entangled $N$-photon state (the {\it NOON}-state). The result of this projection measurement shows a typical interference fringe with an $N$-photon de ... More
On the nuclear obscuration of H2O maser galaxiesDec 11 2009To shed light onto the circumnuclear environment of 22 GHz H2O maser galaxies, we have analyzed some of their multi-wavelength properties, including the far infrared luminosity (FIR), the luminosity of the [O III]\lambda5007 emission line, the nuclear ... More
What can radiative decays of the X(3872) teach us about its nature?Oct 24 2014Feb 11 2015Starting from the hypothesis that the X(3872) is a $D\bar D^*$ molecule, we discuss the radiative decays of the X(3872) into $\gamma J/\psi$ and $\gamma\psi'$ from an effective field theory point of view. We show that radiative decays are very weakly ... More
Polarization of the Cosmic Microwave Background from Non-Uniform ReionizationJan 22 2001Jul 19 2001We study the signal in the Cosmic Microwave Background (CMB) polarization anisotropy resulting from patchy reionization. It is well known that the primordial polarization of the CMB is very sensitive to the details of reionization. Combining a semi-analytic ... More
Influence of a repump laser on a nearly degenerate four-wave-mixing spectrum in atomic vaporsOct 25 2005Nov 30 2005The influence of a repump laser on a nearly degenerate four-wave-mixing (NDFWM) spectrum was investigated. We found the amplitude and line shape of the NDFWM depended strongly on the detuning of the repump field. A five-peak structure was observed. And ... More
Bragg solitons in an electromagnetically induced transparency mediumNov 22 2005Nov 03 2006In this Letter we discuss the possibility of producing Bragg solitons in an electromagnetically induced transparency medium. We show that this coherent medium can be engineered to be a Bragg grating with a large Kerr nonlinearity through proper arrangements ... More
TNSPackage: A Fortran2003 library designed for tensor network state methodsAug 01 2017Recently, the tensor network states (TNS) methods have proven to be very powerful tools to investigate the strongly correlated many-particle physics in one and two dimensions. The implementation of TNS methods depends heavily on the operations of tensors, ... More
Atomistic pseudopotential calculations of the optical properties of InAs/InP self-assembled quantum dotsOct 12 2010We present a comprehensive study of the optical properties of InAs/InP self-assembled quantum dots (QDs) using an empirical pseudopotential method and configuration interaction treatment of the many-particle effects. The results are compared to those ... More
Solitary Waves of the Camassa-Holm Derivative Nonlinear Schrödinger equationDec 12 2018In this paper we examine a deformation of the derivative nonlinear Schr\"odinger (DNLS) equation, the so-called Camassa-Holm DNLS (CH-DNLS) equation. We use two asymptotic multiscale expansion methods to reduce this model to both the modified Korteweg-de ... More
A Diffractive Study of Parametric Process in Nonlinear Photonic CrystalsJan 09 2008We report a general description of quasi-phase-matched parametric process in nonlinear photonic crystals (NLPC) by extending the conventional X-ray diffraction theory in solids. Under the virtual wave approximation, phase-matching resonance is equivalent ... More
Manipulation of polarization and spatial properties of light beams with chiral metafilmsMar 04 2016Two-dimensional lattices of chiral nanoholes in a plasmonic film with lattice constants being slightly larger than light wavelength are proposed for effective control of polarization and spatial properties of light beams. Effective polarization conversion ... More
Demonstration of Temporal Distinguishability in a Four-Photon State and a Six-Photon StateFeb 01 2006An experiment is performed to demonstrate the temporal distinguishability of a four-photon state and a six-photon state, both from parametric down-conversion. The experiment is based on a multi-photon interference scheme in a recent discovered NOON-state ... More
Vector magnetic field sensing by single nitrogen vacancy center in diamondFeb 21 2013In this Letter, we proposed and experimentally demonstrated a method to detect vector magnetic field with a single nitrogen vacancy (NV) center in diamond. The magnetic field in parallel with the axis of the NV center can be obtained by detecting the ... More
Iso-vector dipole resonance and shear viscosity in low energy heavy-ion collisionMay 11 2017The ratio of shear viscosity over entropy density in low energy heavy-ion collision has been calculated by using the Green-Kubo method in the framework of an extended quantum molecular dynamics model. After the system almost reaching a local equilibration ... More
Sodium layer chiral distribution and spin structure of Na$_2$Ni$_2$TeO$_6$ with a honeycomb networkMar 09 2017Mar 10 2017The nature of Na ion distribution, diffusion path, and the spin structure of $P2$-type Na$_2$Ni$_2$TeO$_6$ with a Ni honeycomb network has been explored. The nuclear density distribution of Na ions reveals a 2D chiral pattern within Na layers without ... More
Electron Mass Enhancement near a Nematic Quantum Critical Point in NaFe$_{1-x}$Co$_{x}$AsOct 20 2018A magnetic order can be completely suppressed at zero temperature($T$), by doping carriers or applying pressure, at a quantum critical point(QCP), around which physical properties change drastically. However, the situation is unclear for an electronic ... More
The Baryonic Tully-Fisher Relation cares about the Galaxy SampleFeb 15 2016The Baryonic Tully-Fisher relation (BTFR) is a clear manifestation of the underlying physics of galaxy formation. As such, it is used to constrain and test galaxy formation and evolution models. Of particular interest, apart from the slope of the relation, ... More
Cosmic ray diffusion fronts in the Virgo clusterMay 30 2011The pair of large radio lobes in the Virgo cluster, each about 23 kpc in radius, have curiously sharp outer edges where the radio-synchrotron continuum flux declines abruptly. However, just adjacent to this sharp transition, the radio flux increases. ... More
A condition on the chiral symmetry breaking solution of the Dyson-Schwinger equation in three-dimensional QEDFeb 28 2001May 21 2001In three-dimensional QED, which is analyzed in the 1/$N$ expansion, we obtain a sufficient and necessary condition for a nontrivial solution of the Dyson-Schwinger equation to be chiral symmetry breaking solution. In the derivation, a normalization condition ... More
Dynamics Inside the Radio and X-ray Cluster Cavities of Cygnus A and Similar FRII SourcesJun 21 2012We describe approximate axisymmetric computations of the dynamical evolution of material inside radio lobes and X-ray cluster gas cavities in Fanaroff-Riley II sources such as Cygnus A. All energy is delivered by a jet to the lobe/cavity via a moving ... More
Radiating Bondi and Cooling Site FlowsJun 20 2012Steady accretion of a radiating gas onto a central mass point is described and compared to classic Bondi accretion. Radiation losses are essential for accretion flows to be observed. Unlike Bondi flows, radiating Bondi flows pass through a sonic point ... More
The development of $^{222}$Rn detectors for JUNO prototypeOct 10 2017Dec 14 2017The radioactive noble gas $^{222}$Rn, which can be dissolved in water, is an important background source for JUNO. In this paper, based on the water system of JUNO prototype, two kinds of high sensitivity radon detectors have been proposed and developed. ... More
Estimate of the total mechanical feedback energy from galaxy cluster-centered black holes: implications for black hole evolution, cluster gas fraction and entropyMay 30 2011Jun 22 2011The total feedback energy injected into hot gas in galaxy clusters by central black holes can be estimated by comparing the potential energy of observed cluster gas profiles with the potential energy of non-radiating, feedback-free hot gas atmospheres ... More
Simulating X-ray Supercavities and Their Impact on Galaxy ClustersNov 19 2009Feb 23 2010Recent X-ray observations of hot gas in the galaxy cluster MS 0735.6+7421 reveal huge radio-bright, quasi-bipolar X-ray cavities having a total energy ~10^{62} ergs, the most energetic AGN outburst currently known. We investigate the evolution of this ... More
Removing Cool Cores and Central Metallicity Peaks in Galaxy Clusters with Powerful AGN OutburstsApr 13 2010May 20 2010Recent X-ray observations of galaxy clusters suggest that cluster populations are bimodally distributed according to central gas entropy and are separated into two distinct classes: cool core (CC) and non-cool core (NCC) clusters. While it is widely accepted ... More
Hot versus Cold: the Dichotomy in Spherical Accretion of Cooling Flows onto Supermassive Black Holes in Elliptical Galaxies, Galaxy Groups and ClustersMay 13 2013Nov 16 2013Feedback heating from active galactic nuclei (AGNs) has been commonly invoked to suppress cooling flows predicted in hot gas in elliptical galaxies, galaxy groups and clusters. Previous studies have focused on if and how AGN feedback heats the gas, but ... More
The Fermi Bubbles. I. Possible Evidence for Recent AGN Jet Activity in the GalaxyFeb 28 2011Aug 07 2012The Fermi Gamma-ray Space Telescope reveals two large gamma-ray bubbles in the Galaxy, which extend about 50 degrees (~ 10 kpc) above and below the Galactic center (GC) and are symmetric about the Galactic plane. Using axisymmetric hydrodynamic simulations ... More
Self-consistent evolution of gas and cosmic rays in Cygnus A and similar FR II classic double radio sourcesOct 23 2010In Cygnus A and other classical FR II double radio sources, powerful opposing jets from the cores of halo-centered galaxies drive out into the surrounding cluster gas, forming hotspots of shocked and compressed cluster gas at the jet extremities. The ... More
Cosmic Ray-Dominated AGN Jets and the Formation of X-ray Cavities in Galaxy ClustersSep 07 2010Dec 20 2010It is widely accepted that feedback from active galactic nuclei (AGN) plays a key role in the evolution of gas in groups and clusters of galaxies. Unequivocal evidence comes from quasi-spherical X-ray cavities observed near cluster centers having sizes ... More
Nonlinear magneto-optic effects in doped graphene and gapped graphene: a perturbative treatmentNov 13 2017Mar 02 2018The nonlinear magneto-optic responses are investigated for gapped graphene and doped graphene in a perpendicular magnetic field. The electronic states are described by Landau levels, and the electron dynamics in an optical field is obtained by solving ... More
Existence and Stability of Standing Pulses in Neural Networks : I ExistenceJul 08 2004We consider the existence of standing pulse solutions of a neural network integro-differential equation. These pulses are bistable with the zero state and may be an analogue for short term memory in the brain. The network consists of a single-layer of ... More
Nonperturbative model for optical response under intense periodic fields with application to graphene in a strong perpendicular magnetic fieldDec 26 2017Mar 02 2018Graphene exhibits extremely strong optical nonlinearity when a strong perpendicular magnetic field is applied, the response current shows strong field dependence even for moderate light intensity, and the perturbation theory fails. We nonperturbatively ... More
Transverse wobbling motion in $^{134}$Ce and $^{136}$NdMar 27 2016Mar 29 2016The existence of one-phonon and possible two-phonon transverse wobbling bands is proposed for the first time in two even-even nuclei, $^{134}$Ce and $^{136}$Nd. The predominant $E2$ character of the $\Delta I = 1$ transitions connecting the one-phonon ... More
Existence and Stability of Standing Pulses in Neural Networks: II StabilityJul 08 2004We analyze the stability of standing pulse solutions of a neural network integro-differential equation. The network consists of a coarse-grained layer of neurons synaptically connected by lateral inhibition with a non-saturating nonlinear gain function. ... More
Experimental Measurement of Multi-dimensional Entanglement via Equivalent Symmetric ProjectionJun 07 2007Nov 20 2007We construct a linear optics measurement process to determine the entanglement measure, named \emph{I-concurrence}, of a set of $4 \times 4$ dimensional two-photon entangled pure states produced in the optical parametric down conversion process. In our ... More
Demonstration of Temporal Distinguishability of Three and Four Photons with Asymmetric Beam SplitterJul 21 2007By using an asymmetric beam splitter, we observe the generalized Hong-Ou-Mandel effects for three and four photons, respectively. Furthermore, we can use this generalized Hong-Ou-Mandel interferometer to characterize temporal distinguishability.
Demonstration of Controllable Temporal Distinguishability in a Three-Photon StateJun 14 2006Multi-photon interference is at the heart of the recently proposed linear optical quantum computing scheme and plays an essential role in many protocols in quantum information. Indistinguishability is what leads to the effect of quantum interference. ... More
Total Reaction Cross Section in an Isospin-Dependent Quantum Molecular Dynamics (IDQMD) ModelMay 14 2003The isospin-dependent quantum molecular dynamics (IDQMD) model is used to study the total reaction cross section $\sigma_R$. The energy-dependent Pauli volumes of neutrons and protons have been discussed and introduced into the IDQMD calculation to replace ... More
Nonlocal linear compression of two-photon time interval distributionAug 26 2013Oct 09 2013We propose a linear compression technique for the time interval distribution of photon pairs. Using a partially frequency-entangled two-photon (TP) state with appropriate mean time width, the compressed TP time interval width can be kept in the minimum ... More
Adversary Resistant Deep Neural Networks with an Application to Malware DetectionOct 05 2016Apr 27 2017Beyond its highly publicized victories in Go, there have been numerous successful applications of deep learning in information retrieval, computer vision and speech recognition. In cybersecurity, an increasing number of companies have become excited about ... More
Learning Adversary-Resistant Deep Neural NetworksDec 05 2016Deep neural networks (DNNs) have proven to be quite effective in a vast array of machine learning tasks, with recent examples in cyber security and autonomous vehicles. Despite the superior performance of DNNs in these applications, it has been recently ... More
Molecular dynamics simulation of the order-disorder phase transition in solid NaNO$_2$Jul 21 2003We present molecular dynamics simulations of solid NaNO$_2$ using pair potentials with the rigid-ion model. The crystal potential surface is calculated by using an \emph{a priori} method which integrates the \emph{ab initio} calculations with the Gordon-Kim ... More
Contact effects in spin transport along double-helical moleculesMay 19 2014We report on spin transport along double-helical molecular systems by considering various contact configurations and asymmetries between the two helical strands in the regime of completely coherent charge transport. Our results reveal that no spin polarization ... More
Learning Adversary-Resistant Deep Neural NetworksDec 05 2016Aug 19 2017Deep neural networks (DNNs) have proven to be quite effective in a vast array of machine learning tasks, with recent examples in cyber security and autonomous vehicles. Despite the superior performance of DNNs in these applications, it has been recently ... More
Coulomb Interaction Effects on the Terahertz Photon-Assisted Tunneling through a InAs Quantum DotAug 14 2014Recently, the terahertz (THz) photon-assisted tunneling (PAT) through a two-level InAs quantum dot (QD) has been successfully realized in experiment [Phys. Rev. Lett. {\bf 109}, 077401 (2012)]. The Coulomb interaction in this device is comparable with ... More
Four-Photon Interference with Asymmetric Beam SplittersDec 01 2006Jun 25 2007Two experiments of four-photon interference are performed with two pairs of photons from parametric down-conversion with the help of asymmetric beam splitters. The first experiment is a generalization of the Hong-Ou-Mandel interference effect to two pairs ... More
Probe Spin-Velocity Dependent New Interactions by Spin Relaxation Times of Polarized $^{3}He$ GasDec 28 2014Sep 18 2015We have constrained possible new interactions which produce nonrelativistic potentials between polarized neutrons and unpolarized matter proportional to $\alpha\vec{\sigma}\cdot\vec{v}$ where $\vec{\sigma}$ is the neutron spin and $\vec{v}$ is the relative ... More
Efficient Scheme of Experimental Quantifying non-Markovianity in High-Dimension SystemsJan 29 2015The non-Markovianity is a prominent concept of the dynamics of the open quantum systems, which is of fundamental importance in quantum mechanics and quantum information. Despite of lots of efforts, the experimentally measuring of non-Markovianity of an ... More
Experimental demonstration of phase measurement precision beating standard quantum limit by projection measurementOct 15 2007We propose and demonstrate experimentally a projection scheme to measure the quantum phase with a precision beating the standard quantum limit. The initial input state is a twin Fock state $|N,N>$ proposed by Holland and Burnett [Phys. Rev. Lett. {\bf ... More
Demonstration of three-photon de Broglie wavelength by projection measurementOct 31 2006Two schemes of projection measurement are realized experimentally to demonstrate the de Broglie wavelength of three photons without the need for a maximally entangled three-photon state (the NOON state). The first scheme is based on the proposal by Wang ... More
Mechanism of unidirectional emission of ultrahigh Q Whispering Gallery mode in microcavitiesAug 25 2009The mechanism of unidirectional emission of high Q Whispering Gallery mode in deformed circular micro- cavities is studied and firstly presented in this paper. In phase space, light in the chaotic sea leaks out the cavity through the refraction regions, ... More
Exploring binding energy and separation energy dependences of HBT strengthJan 08 2004Apr 05 2004Hanbury Brown-Twiss (HBT) results of the nucleon-nucleon correlation function have been presented for the nuclear reactions with neutron-rich projectiles (Be isotopes) using an event-generator, the Isospin-Dependent Quantum Molecular Dynamics model. We ... More
A proposed reaction channel for the synthesis of the superheavy nucleus Z = 109Feb 19 2004Feb 28 2004We apply a statistical-evaporation model (HIVAP) to calculate the cross sections of superheavy elements, mainly about actinide targets and compare with some available experimental data. A reaction channel $^{30}$Si + $^{243}$Am is proposed for the synthesis ... More
Antiferromagnetism of Ni2NbBO6 with S = 1 dimer quasi-one-dimensional armchair chainsJan 21 2015Long range antiferromagnetic (AFM) ordering of Ni spins in Ni2NbBO6 has been studied with single crystal from spin susceptibility measurement and comparedwith the ab initio calculation results consistently. Below TN = 23.5 K, the S = 1 spins align along ... More
Constructions of the soluble potentials for the non-relativistic quantum system by means of the Heun functionsOct 19 2017The Schr\"{o}dinger equation $\psi"(x)+\kappa^2 \psi(x)=0$ where $\kappa^2=k^2-V(x)$ is rewritten as a more popular form of a second order differential equation through taking a similarity transformation $\psi(z)=\phi(z)u(z)$ with $z=z(x)$. The Schr\"{o}dinger ... More
Entanglement and interference between different degrees of freedom of photons statesApr 17 2007Jan 04 2008In this paper, photonic entanglement and interference are described and analyzed with the language of quantum information process. Correspondingly, a photon state involving several degrees of freedom is represented in a new expression based on the permutation ... More